Why is it that Serum Iron levels drop later in the day? Why does blood testing for Serum Iron levels need to be performed early in the morning?
Iron levels vary throughout the day but the reason that they usually test in the morning is because food that you eat can alter the levels so they take it before you have had any food to eat. You should not take any iron pills or tablets for 24 hours before the test. Iron is absorbed rapidly from food or pills and can make your iron levels falsely high.
